Improvement in filters



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Filter.

Nox. 133,720. Patented Dec.1o,1872.

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WILLIAM o. BETTIJQHN, 0E ozARK, MISSOURI.

IMPROVEMENT IN F'ILTERS.

Specilication forming, part of Letters Patent No. 133,720, datedDecember 10,i 1872.

Y To all whom it may concern:

choked, and which maybe readily cleaned.`

The nature of this invention consists in the use of solid Tripoli as themedium through which the water or other liquid to be filtered is passed.

The drawing represents a vessel, in section, formed of solid Tripoli asone of the Ways in which the same can be used.

The filter, of any suitable form, size, and construction, is providedwith a filtering diaphragm or medium of Tripoli.

As shown in the drawing, A represents a Tripoli vessel for the receptionof the liquid to be ltered.

The natural formation of Tripoli being peculiarly adapted to allow thewater or liquid to percolate and lter in its passage, a most clear,pure, and healthy filtration of the liquid matter is achieved.

As readily apparent the Tripoli is adapted for the use, lining,building, or forming of cisterns, reservoirs, or other 'receptacles forthe filtration of water and liquids for household and similar purposes.

Having thus fully described my said invention, what I claim is Afiltering medium or vessel of solid Tripoli, as and for the purpose setforth.

In testimony of said invention I have hereunto set my hand.

WILLIAM C.' PETTIJOHN.

l Witnesses:

WILLIAM W. HERTHEL, ROBERT BURNS.

